[FA-5] Adds image support with proper S3 upload and replacement after upload

FictionArchive.Service.NovelService/Services/EventHandlers/FileUploadRequestStatusUpdateEventHandler.cs

@@ -0,0 +1,39 @@
+using FictionArchive.Common.Enums;
+using FictionArchive.Service.NovelService.Models.IntegrationEvents;
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.NovelService.Services.EventHandlers;
+
+public class FileUploadRequestStatusUpdateEventHandler : IIntegrationEventHandler<FileUploadRequestStatusUpdateEvent>
+{
+    private readonly ILogger<FileUploadRequestStatusUpdateEventHandler> _logger;
+    private readonly NovelServiceDbContext _context;
+    private readonly NovelUpdateService _novelUpdateService;
+
+    public FileUploadRequestStatusUpdateEventHandler(ILogger<FileUploadRequestStatusUpdateEventHandler> logger, NovelServiceDbContext context, NovelUpdateService novelUpdateService)
+    {
+        _logger = logger;
+        _context = context;
+        _novelUpdateService = novelUpdateService;
+    }
+
+    public async Task Handle(FileUploadRequestStatusUpdateEvent @event)
+    {
+        var image = await _context.Images.FindAsync(@event.RequestId);
+        if (image == null)
+        {
+            // Not a request we care about.
+            return;
+        }
+        if (@event.Status == RequestStatus.Failed)
+        {
+            _logger.LogError("Image upload failed for image with id {imageId}", image.Id);
+            return;
+        }
+        else if (@event.Status == RequestStatus.Success)
+        {
+            _logger.LogInformation("Image upload succeeded for image with id {imageId}", image.Id);
+            await _novelUpdateService.UpdateImage(image.Id, @event.FileAccessUrl);
+        }
+    }
+}